tests/qemu-iotests/052

   1 #!/bin/bash
   2 #
   3 # Test bdrv_read/bdrv_write using BDRV_O_SNAPSHOT
   4 #
   5 # Copyright (C) 2013 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 # creator
  22 owner=stefanha@redhat.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 here=`pwd`
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39
  40 _supported_fmt generic
  41 _supported_proto file
  42 _supported_os Linux
  43
  44 # Don't do O_DIRECT on tmpfs
  45 _supported_cache_modes "writeback" "writethrough" "unsafe"
  46
  47 size=128M
  48 _make_test_img $size
  49
  50 echo
  51 echo "== initializing whole image =="
  52 $QEMU_IO -c "write -z 0 $size" "$TEST_IMG" | _filter_qemu_io
  53
  54 echo
  55 echo "== reading whole image =="
  56 $QEMU_IO -s -c "read 0 $size" "$TEST_IMG" | _filter_qemu_io
  57
  58 echo
  59 echo "== writing whole image does not modify image =="
  60 $QEMU_IO -s -c "write -P 0xa 0 $size" "$TEST_IMG" | _filter_qemu_io
  61 $QEMU_IO -c "read -P 0 0 $size" "$TEST_IMG" | _filter_qemu_io
  62
  63 # success, all done
  64 echo "*** done"
  65 rm -f $seq.full
  66 status=0